package proxy;

import org.apache.log4j.Logger;
import service.Buyer;

public class IntermediaryImpl implements Buyer {
    private Logger logger = Logger.getLogger(IntermediaryImpl.class);

    /**
     * 被处理的目标对象，即其内部含有对真实主题的引用
     * @return
     */
    //里氏替换原则：子类可以替换父类，出现父类能够出现的任务地方
    private Buyer target;

    public IntermediaryImpl(Buyer target){
        this.target = target;
    }

    /**
     * 对目标对象业务进行代理
     * @return
     */
    @Override
    public String havealook() {
        before();
        String feedback = target.havealook(); //执行目标对象的实际业务
        after();
        return "看房记录：买家反馈“"+feedback+"“";
    }
    public void before(){
        logger.debug("前期准备");
        logger.debug("查找房源");
        logger.debug("和卖家沟通时间");
    }
    public void after(){
        logger.debug("后期跟踪");
        logger.debug("和买家沟通意见");
    }
}
